Arm-rest for dental chairs.



No. 762,877. PATE-MED- JUNE 21, 19041 4 A. :W-.HBROWNR ARM REST PoRDENTAL CHAIRS.

` PrLIoATIoN'rILnD 00129, 1903.v

No. 762,877. PATENTBD JUNE 21,l 1904. 'A..:w. BROWNE.`

ARM REST PoR DENTAL CHAIRS. APPLICATION FILED 00T.29, 1903.v

PATENTBD JUNE 21; 1904.

A. W'. BROWN-E. ARM REST Pon DENTAL CHAIRS.

APPLICATION FILI-ID 0032.29, 1903'.

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INVENTOR:

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No. 762cv?.

Patented June 1904;.

UNITED STATES PATENT OFFICE.

ARTHUR W. BROWNE, OF PRINOEBAY,NEVV YORK, ASSIG'NOR TO THE S. S. WHITEDENTAL MANUFACTURING COMPANY, OF PHILADEL- PHIA,l PENNSYLVANIA.

ARM-RESTFOR DENTAL CHAIRS.

SPEQIFICATION forming part of Letters Patent No. 762,877, dated June 21,1904. Application filed October 29, 1903. Serial No. 179,001. (Nomodel.)

To (LZZ whom, t may concern:

Be it known that I, ARTHUR W. BRQWNE, a citizen of the UnitedStates,residing at Princebay, in the county of Richmond and State of New York,have invented a certain new and useful Improvement in Arm-Rests forDental Chairs; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame. Y Y

My invention relates to arm-rests for den tal chairs, and particularlyto that class of arm-rests capable of being adjusted horizontally towardand away from the chair-seat.

The chief object of my invention is to provide an arm-rest of thischaracter that lcan be quickly and easily adjusted, securely locked inposition, and the locking mechanism of which does not project beyond theside of the chair. A

The invention consists in certain improvenie-nts indicated in theaccompanying drawings and described and claimed hereinafter. In thedrawings, Figure l 1s a View 1n side Velevation of the seat-frame andseat of a dental chair and one form of my improved armrest connectedthereto. Fig. 2 is a plan view of a portion of said seat-frame (the seatbeing omitted) and said arm-rest. Fig. 3 is a View in vertical sectionon the line 3 3 of Fig. 1. Fig. et is a View in vertical section on theline 4 4 of Fig. l. Fig. 5 is an inverted plan view showing theconnecting-bar. Figs. 6 and 7 are views in side elevation and plan,respectively, of the seat-frame, the arm-rest-carrying section beingomitted. Figs. 8 and 9 are side and plan views, respectively, of saidarmrest-carrying section detached. Figs. l0, 11, l2, and 13 are viewscorresponding, respectively, withFigs. l, 2, 3, and 4 ofan armrest ofmodilied construction.

The arm-rest proper consists of a suitablyupholstered bar A,supported-in a horizontal position above the side of the seat-frame Dand parallel therewith. This bar is connected to said seat-frame bymeans of two parallel upright standards O C, which have horizontalturning connection with said seat-frame at c c and also with thearm-rest proper at c c. The standards O C are some distance apart andare bent or curved, yas shown, so that theV -parallel therewith, thestandards O C must rotate in unison when the arm-rest is adjustedlaterally. l For this purpose the standards are provided on their lowerextremities, which project beneath the seat-frame, with rockarms C C',united by a connecting-bar E.

Means are provided for locking the armrest in any position to which itmay be adjusted. This may consist of a headed bolt F, secured to theseat-frame and passing through a curved slot e in the connecting-bar,and a nut Gr, screwing on the lower end of the bolt and provided with anoperating handle or lever G. When the handle G is moved toward and underthe seat-frame,the connectingbar is clamped against the seat-frame andthe standards C C are firmly locked against rotation and the arm-restheld in position.

In order to provide for moving the armrest away from the side of thechair, thus tion D2 between the seat-frame and the movable sectionthereof is preferably a detachable connection as well as pivotal inorder that the arm-rest may be detached when desired. For

this purpose the connection consists of a pintle D2 on the movablesection fitted in a corresponding socket CZ of the seat-frame.

It is not necessary to secure the arm-rest s tandards C C to a movablesection of the seat-frame, as other means may be employed for renderingthe ,arm-rest detachable, or, if desired, the detachable featuremay beomitted entirely.

In the construction illustrated in Figs. l0

lto 13 the lower ends of the standards C C have detachable connectionwith the sockets of the rock-arms C', which are united by theconnecting-bar E. (See Fig. 13.) A slot c2 in the lower extremity ofeach standard, engaging a cross-pin c3 in its respective socket,prevents independent turning movement of the standards and levers and atthe same time permits of the former being readily detached from thelatter. A simple means for preventing accidental detachment of the.standards is shown as consisting of a latch-plate K, pivoted midway itslength at t' to the seatframe. The ends of this plate are adapted toengage annular grooves c4 on the standard C, one end bearing on the`inner side of one standard and the other end bearing on the opposite orouter side of the other standard. Extensions 7c of the latch-plateproject one at a time slightly outside the seat-frame. By pressing theextension inward the latchplate is rocked and both standards aresimultaneously released, while pressure upon the extension k2 securelylocks both standards against withdrawal. If preferred, the eXtension k2may be dispensed with anda spring employed for causing the latch tonormally engage the standards.

I claim as my inventionl. In an arm-rest for dental chairs, thecombination. of the seat-frame, two curved and parallel upright supportshaving horizontal turning' connection with said seat-frame, an

arm-rest mounted upon said supports, and means for locking said supportsin any position-to which they may be rotated, substantially asdescribed.

2. In an arm-rest for dental chairs, the combination of the seat-frame,two curved and parallel upright supports having turning and detachableconnection with said seat-frame, an arm-rest mounted upon said supports,and means for locking said supports in any position to which they may berotated, substantially as described.

3. In an arm-rest for dental chairs, the combination with theseat-frame, of a movable side section thereof having horizontal turningconnection therewith, two curved and parallel upright supports havinghorizontal turning connection with said movable section, and an arm-restmounted upon said supports, substantially as described.

4. In an arm-rest for dental chairs, the combination with theseat-frame, of a movable side section thereof having horizontal turningconnection therewith, means for locking said movable section to theseat-frame, two curved and parallel upright supports having horizontalturning connection with said movable section, and an arm-rest mountedupon said supports, substantially as described.

5. In an arm-rest for dental chairs, the combination with theseat-frame, of a detachable side section thereof, having horizontalturning connection therewith, two curved and parallel upright supportshaving horizontal turning connection with said movable section, and anarm-rest mounted upon said supports, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

ARTHUR W. BROVVNE.

Witnesses:

GEO. D. HECK, ALBERT A. SIEvERs.

